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'73 commando 850 road test #358385
02/15/11 4:33 pm
02/15/11 4:33 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
BritBike Forum member
MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
From Oct, '73 Motorcycle World, reports that the new 850 Commando, totally stock with a 21T sprocket, did the 1/4 in 12.75 and that it would "pull all the way to an indicated 125." I'd like to believe that test but it sounds impossible to me.

It seems to me that 21T is too tall for a 12.75 1/4 mile and too short for 125MPH. But I think from now on those are the specs I'll use for my '73 850! smile

Here's the test: http://www.classicbike.biz/Norton/Mags/1970s/1973NortonMC-World.pdf

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Re: '73 commando 850 road test [Re: MexicoMike] #358403
02/15/11 6:31 pm
02/15/11 6:31 pm
Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
S
Skeet Offline
BritBike Forum member
Skeet  Offline
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S
Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
Mike if it suits your ego thats great, but I thought you might enjoy these comparisons to bring that top speed down a tad. 1/4 mile time might be do-able also with a hundred pound rider. grin Anyways, thoroughly enjoyed the road test. bigt



left to right 73 Dunstall 850, 72 750 Roadster, 71 750 Fastback

Skeet


Skeet Enjoy life....it has an expiration date..
1964 Hornet
1970 TR6R
1971 Norton
1972 XLH
Re: '73 commando 850 road test [Re: Skeet] #358461
02/15/11 10:53 pm
02/15/11 10:53 pm
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
MexicoMike Offline OP
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MexicoMike  Offline OP
BritBike Forum member
Joined: Sep 2006
Posts: 609
Mexico City, Mexico
Interesting - those tests are in line with the actual capabilities of the bike - RPM/gear ratio. The one I posted makes no mechanical sense...

Re: '73 commando 850 road test [Re: MexicoMike] #358468
02/16/11 12:09 am
02/16/11 12:09 am
Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
S
Skeet Offline
BritBike Forum member
Skeet  Offline
BritBike Forum member
S
Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
Here's a couple more for you. Your 73 is on the right. Unlike Cycle World it looks like the Cycle Guide crew were chicken to try out the topend. grin Also, check out the sprockets. I had always heard the 750's were quicker. Could this be where that nasty rumor came from? crazy



Skeet


Skeet Enjoy life....it has an expiration date..
1964 Hornet
1970 TR6R
1971 Norton
1972 XLH
Re: '73 commando 850 road test [Re: MexicoMike] #358497
02/16/11 4:00 am
02/16/11 4:00 am
Joined: Aug 2001
Posts: 1,839
British Columbia
hh Offline
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hh  Offline
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Posts: 1,839
British Columbia
That looks like the Combat spec on the left. Note the compression ratio and quoted horsepower.


"Beer is proof that God loves us and wants us to be happy" - Benjamin Franklin
Re: '73 commando 850 road test [Re: MexicoMike] #358535
02/16/11 3:22 pm
02/16/11 3:22 pm
Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
S
Skeet Offline
BritBike Forum member
Skeet  Offline
BritBike Forum member
S
Joined: Dec 2004
Posts: 1,280
Orleans Massachusetts
Good catch HH. Here's 3 more and I'm done. Now you can all form your opinions. The only thing I know from all this is the Nortons weren't slouches.

Another Cycle Guide 2 months earlier. Looks like they took a peak at the speedometer this time


1972 Super Bike magazine At least they weren't chicken on the high end.


And finally just for fun here's Cycles 73 Superbike comparison to show the competition. No top runs for these guys either. Cowards!


Skeet


Skeet Enjoy life....it has an expiration date..
1964 Hornet
1970 TR6R
1971 Norton
1972 XLH
Re: '73 commando 850 road test [Re: Skeet] #358630
02/16/11 11:23 pm
02/16/11 11:23 pm
Joined: Aug 2001
Posts: 1,965
Oztralia
R
Rohan Online content
BritBike Forum member
Rohan  Online Content
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R
Joined: Aug 2001
Posts: 1,965
Oztralia
Makes you realise just how fast the factory tuned 850 Mk1 Roadster that Dave Rawlins was campaigning in 1973 was -
- 1/4 mile @ 12.1 sec @ 114mph

The Stage 1 and Stage 2 tuning sheets that the factory put out detailed all the changes in his bike.
Since these wouldn't meet noise testing requirements, could not be sold as a factory model...

Re: '73 commando 850 road test [Re: MexicoMike] #359767
02/24/11 3:08 am
02/24/11 3:08 am
Joined: Jul 2006
Posts: 466
just a guy from Jersey [Hopewe...
N
nert Offline
BritBike Forum member
nert  Offline
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N
Joined: Jul 2006
Posts: 466
just a guy from Jersey [Hopewe...
does that mean i can turn my 73 850 commando into a 12.1 sec quarter mile burner?


keep your "oddies" lubricated, and carry a dime
Re: '73 commando 850 road test [Re: MexicoMike] #359888
02/24/11 7:54 pm
02/24/11 7:54 pm
Joined: Jun 2007
Posts: 5,557
Maui Hawaii
HawaiianTiger Online content

BritBike Forum member
HawaiianTiger  Online Content

BritBike Forum member
Joined: Jun 2007
Posts: 5,557
Maui Hawaii
Probably.
When I first picked up my Commando, it was kitted for BOTT racing and had the stage one hop up. It sure was faster than it is now that it has been returned to stock. I raced a very fast Corvette on the street and when I shut off a about 100mph we were dead even. I'm pretty sure I could get in the low 12's with the way it was back then. Launching was the first obstacle. Nuts on the tank and hope you don't loop it.
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.

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